Why is it important for valves to be properly seated?

Properly seated valves are crucial for ensuring good compression within the engine's cylinders. When valves are correctly positioned, they create a tight seal that allows for optimal compression during the engine's combustion cycle. This compression is essential for the effective ignition of the fuel-air mixture, resulting in more powerful engine performance and better fuel economy.

If valves are not properly seated, it may lead to leaks where gases can escape, thereby reducing the cylinder's ability to maintain the necessary compression levels. This could result in a loss of power, inefficient fuel use, and potential misfires, all of which negatively impact engine performance. Therefore, maintaining the proper seating of valves is vital for the overall efficiency and effectiveness of an engine's operation.